Stock for a firearm



FIG. 1 is a left side view of a stock for a firearm in a use configuration with environment showing my new design;

FIG. 2 is a perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines depict portions of the stock for a firearm that form no part of the claimed design. The broken lines in FIG. 1 depict environment of a firearm that forms no part of the claimed design. 

CLAIM The ornamental design for a stock for a firearm, as shown and described. 